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man1
Author:
Alice
GeoGebra
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兩位數除以一位數（二）
異分母分數減法
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
柱體建築師
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色彩視覺藝術：內心與旁心
圓錐完成
Multiplication of Polynomials 1(多項式的乘法 1)
折三角形
变化的三角形的旁心.许兴华数学
Discover Topics
LCM and GCD
Confidence Interval
Orthocenter
Hypothesis Testing
Line Segment